742612domain: NAppears in sequencesSum of the 4th powers of the divisors of n is divisible by n.at n=25A046764Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 0, 1), (0, 1, -1), (1, 0, 1)}.at n=12A148787